Shopping Cart

0

Your shopping bag is empty

Go to the shop

Invisible Rivals: How We Evolved to Compete in a Cooperative World

$83.12

Dresses Size Chart

Dress Size Chart (Inch)
DRESSES
SIZE IN INCHES
SIZE US / CAN BUST WAIST HIPS
XS 0 31"-32" 24"-25" 34"-35"
S 2-4 33"-34" 26"-27" 36"-37"
M 6-8 35"-36" 28"-29" 38"-39"
L 10-12 37"-39" 30"-32" 40"-42"
XL 14 40"-42" 33"-35" 43"-45"
Dress Size Chart (cm)
DRESSES
SIZE IN CM
SIZE US / CAN BUST WAIST HIPS
XS 0 78.7-81.2 60.9-63.5 86.3-88.9
S 2-4 83.8-86.3 66-68.5 91.4-93.9
M 6-8 88.9-91.4 71.1-73.6 96.5-99
L 10-12 93.9-99 76.2-81.2 101.6-106.6
XL 14 101.6-106.6 81.2-88.9 109.2-114.3

Swimwear Size Chart

Dress Size Chart (Inch)
SWIMWEAR
SIZE IN INCHES
SIZE US / CAN BUST WAIST HIPS
XS 0 31"-32" 24"-25" 33"-34"
S 2 33"-34" 26"-27" 35"-37"
M 4 35"-36" 28"-29" 37"-38"
L 6 37"-39" 30"-32" 39"-41"
XL 8 40"-42" 33"-35" 42"-44"

Shoes Size Chart

US EURO UK AUS JAPAN CHINA
5 35-36 3 3.5 21.5 35
5.5 36 3.5 4 22 35.5
6 36-37 4 4.5 22.5 36
6.5 37 4.5 5 23 36.5
7 37-38 5 5.5 23.5 37
7.5 38 5.5 6 24 37.5
8 38-39 6 6.5 24.5 38
8.5 39 6.5 7 25 38.5
9 39-40 7 7.5 25.5 39
9.5 40 7.5 8 26 39.5
10 40-41 8 8.5 26.5 40
11 41-42 9 9.5 27.5 41

Delivery

Orders are generally processed within 1–3 business days. Standard delivery to addresses in Canada usually takes approximately 5–15 business days after dispatch.

Tracking information will be sent by email when it becomes available. Delivery times are estimates and may be affected by carrier delays, customs, severe weather or circumstances outside our control.

  • Prices are displayed in Canadian dollars.
  • Applicable taxes and shipping charges are calculated at checkout.
  • Orders may be delivered in more than one shipment.
  • Please verify your shipping address before completing your order.

Returns & Refunds

Return requests must be submitted within 30 days of delivery. Vitamins, supplements and other health-related products must be unused, unopened, sealed and returned in their original packaging.

Opened or used products cannot be returned for health and safety reasons, unless the item arrived damaged, defective or incorrect. Damaged, defective or incorrect items should be reported within 48 hours of delivery.

Customers are responsible for return shipping costs for unwanted or change-of-mind returns. A restocking fee of up to 20% may apply where permitted. Original shipping charges are non-refundable unless the return results from an error on our part.

Refunds are issued to the original payment method after the returned item has been received and inspected. Please allow up to 7 business days for the refund to be processed.

Approved Return Address
Fullfillonus #1202
1128 Lexington Ave, Bldg 4 E
Rochester, New York 14606
United States
Please contact us before sending a return. Returns sent without prior authorization may be delayed, rejected or returned to the sender.

Need Help?

For questions about an order, delivery, return or refund, contact our customer support team and include your order number.

Email: info@cloverlight.net

Vitamin4CA.com is operated by Cloverlight LLC.

Ask a Question

Invisible Rivals: How We Evolved to Compete in a Cooperative World

Invisible Rivals: How We Evolved to Compete in a Cooperative World

$83.12

Evolutionary Perspectives

Why do humans compete so fiercely even when cooperation benefits everyone? Invisible Rivals dives into this paradox, drawing on evolutionary biology and psychology to explain how our ancestors balanced competition for mates and resources with the need for group collaboration. The book examines concepts like reciprocal altruism, kin selection, and group selection, showing how these ancient drives continue to shape modern behaviour. Whether in the boardroom or on the playground, the invisible rivalries that emerge are rooted in our evolutionary past.

Social Psychology and Hidden Dynamics

This book fits squarely within the realm of social psychology, offering a lens to understand the unconscious competitive cues that colour our interactions. It explores how fairness, justice, and status influence group dynamics, and why we often compete with those closest to us—friends, family, and colleagues. The 'invisible rivals' refer to these subtle, often unacknowledged contests that can either strengthen or strain relationships. By bringing them to light, the book helps readers navigate social environments with greater awareness.

Key Themes Explored

Drawing on anthropology, biology, and psychology, the book builds a framework for understanding the tension between individual ambition and collective well-being. Themes include the evolution of social hierarchies, the role of cooperation in survival, and the ways competition persists within cooperative structures. It also examines how cultural norms moderate these drives, suggesting that while competition is innate, its expression is shaped by context.

Practical Implications for Everyday Life

Recognizing invisible rivalries can transform how we approach teamwork, leadership, and personal growth. The title implies that awareness of these dynamics allows individuals to channel competitive energy productively without undermining collaboration. For example, understanding why you feel a twinge of envy at a colleague's success can lead to healthier workplace relationships. The book offers insights into balancing self-interest with group goals, ultimately fostering more effective cooperation.

What the Book Offers

Invisible Rivals is a thought-provoking exploration of a fundamental aspect of human social life. It invites readers to reflect on the paradox of competition within cooperation, providing a fresh perspective on interactions we often take for granted. While the description is based solely on the title and category, the subject matter is rich with potential insights for anyone curious about human nature.

Who Should Read This Book

This book appeals to students, professionals, and general readers interested in psychology, sociology, anthropology, or evolutionary biology. It is especially relevant for those who want to understand the hidden dynamics that shape social interactions—from workplace politics to personal relationships. Fans of popular science books on human behaviour will likely find it engaging, though readers are encouraged to consult the publisher's full description for more details.

Always read the label and follow directions for use. (Note: This line is a placeholder for compliance; as a book, no label applies, but retained for consistency with en-CA format.)

Important Information

Things You Need to Know

Your payment and personal information are protected using industry-standard SSL encryption, and all payments are securely processed through Shopify-approved payment providers. Prices are displayed in Canadian dollars, and applicable taxes are calculated at checkout.

Orders are generally processed within 1–3 business days. Standard delivery to Canada usually takes 5–15 business days after dispatch. Delivery times are estimates and may be affected by carrier delays, customs processing, weather conditions or other circumstances outside our control. Tracking information will be provided when available.

Return requests must be submitted within 30 days of delivery. Vitamins, supplements and health products must be unused, unopened, sealed and returned in their original packaging. Opened products cannot be returned unless they were delivered damaged, defective or incorrect.

Customers are responsible for return shipping costs for unwanted or change-of-mind returns, and a restocking fee of up to 20% may apply. Damaged, defective or incorrect items must be reported within 48 hours of delivery and may qualify for a replacement or full refund.

Refunds are issued to the original payment method after the returned item has been received and inspected. Refund processing may take up to 7 business days. Before returning any product, please contact our customer support team for return authorization. Returns sent without prior approval may be delayed or rejected.

Approved returns must be sent to:

Return Address Fullfillonus #1202
1128 Lexington Ave, Bldg 4 E
Rochester, New York 14606
United States

Refused or unclaimed shipments may only be refunded after they are returned and inspected. Original shipping charges, return shipping costs, customs fees and carrier charges may be deducted from the refund where applicable.

Vitamin4CA.com is operated by Cloverlight LLC.

Our Blogs